Our dog was rehomed from the greyhound trust,we go back up there regularly to walk the kennel dogs and eddie goes there when we go on holiday, he is always happy to see Kath (who runs the place) and the helpers. he has also met his old trainer a couple of times and been fine. It is obviously going to depend on why your dog was rehomed but unless there was any neglect/violence the dog would probably be happy to see them.

I took on my nephew's Labrador , Milo , 2 years ago. He comes to visit occasionally and Milo is pleased to see him , but dogs like routine and being part of a pack , Milo has decided he belongs here and has no anxiety at all when my nephew leaves , so much so , even when my nephew jokingly tries to tempt him back he won't go with him when called

The reason for asking this is due to a change in work location and patterns, so it might be that my girlfriend's dog needs to be rehomed. However, there is someone who lives near who might take the dog, so they could very well (and probably will) bump into each other from time to time; no issues with neglect or any other negatives at all - it's purely about what's best for the animule, and how it would react.